Pressure-flow-volume relationships in the pulmonary circulation of normal highlanders : effects of unilateral pulmonary artery occlusion, exercise, and hypoxia

Abstract

Summary. Pulmonary blood volume in NHL is comparable to that in sea level residents. In resting NHL, pulmonary hypertension is best explained by, structural changes in pulmonary vessels. In NHL, exercise elicits a pulmonary vasoconstriction which is probably due to mixed venous hypoxaemia superimposed upon alveolar hypoxia.